main reason is

USAGE SUMMARY

The phrase "main reason is" is correct and usable in written English.
It can be used to introduce the primary cause or explanation for a particular situation or argument. Example: "The main reason is that the project was not adequately funded, leading to delays in completion."

✓ Grammatically correct

News & Media

Science

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

The main reason is space.

The Economist

The main reason is cost.

The Economist

The main reason is Russia.

The New York Times

The main reason is bureaucracy.

The Economist

One main reason is uncertainty.

The New York Times

But the main reason is politics.

The New York Times

The main reason is the dollar.

The Economist

Yet the main reason is already known.

The Economist

The main reason is the economy.

The Economist

The main reason is Palestine.

The Guardian - Opinion

The main reason is money.

The Washington Post

Expert writing Tips

Best practice

When using "main reason is", ensure it clearly connects the cause and effect to avoid ambiguity. A strong, direct statement following the phrase enhances clarity.

Common error

Avoid starting multiple consecutive sentences with "main reason is". Vary your sentence structure by using alternatives like "primarily", "chiefly", or rephrasing to maintain reader engagement.

Linguistic Context

The phrase "main reason is" functions as a causal connector, linking a cause and its effect or explanation. Ludwig confirms its usability. It introduces the primary explanation for a given situation, as demonstrated in the examples provided.

Expression frequency: Very common

Frequent in

News & Media

68%

Science

18%

Formal & Business

6%

Less common in

Academia

3%

Encyclopedias

0%

Wiki

0%

Ludwig's WRAP-UP

The phrase "main reason is" serves as a crucial causal connector, effectively linking causes and effects, as validated by Ludwig. It's grammatically sound and highly versatile, appearing frequently in diverse contexts, particularly within news media and scientific publications. While primarily neutral in register, the phrase's overuse should be avoided to prevent redundancy. Ludwig examples demonstrate its effectiveness in providing clear explanations, making it a valuable tool for precise and informative communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

primary cause is

Replaces "main" with "primary", emphasizing the principal cause.

chief reason is

Substitutes "main" with "chief", highlighting the most important reason.

principal factor is

Uses "principal factor" instead of "main reason", focusing on the key influencing element.

major contributing factor is

Emphasizes that the reason is a significant element contributing to the outcome.

key factor is

Shortens the phrase while retaining the emphasis on importance.

the biggest reason is

Replaces "main" with "biggest" for emphasis.

the primary driver is

Focuses on what is propelling or causing something.

the root cause is

Highlights the fundamental cause of the issue.

foremost reason is

Uses "foremost" to indicate the most prominent reason.

the underlying reason is

Emphasizes a less obvious, but fundamental cause.

FAQs

How can I use "main reason is" in a sentence?

You can use "main reason is" to introduce the primary cause or explanation for a particular situation. For example, "The main reason is that the project was not adequately funded, leading to delays in completion."

What can I say instead of "main reason is"?

You can use alternatives like "primary cause is", "chief reason is", or "principal factor is" depending on the context.

Which is correct, "main reason is" or "the main reason are"?

"Main reason is" is correct when referring to a singular reason. If referring to multiple reasons, use "the main reasons are."

What's the difference between "main reason is" and "one main reason is"?

"Main reason is" implies that it is the single most important reason, while "one main reason is" suggests that it's one of several significant reasons.